U.S. Air Force Tech. Sgt. Alexandra McElwain, 23d Operational Medical Readiness Squadron aerospace medical craftsman, performs a nasal swab on an active duty Airman during a COVID-19 Tier 2 screening at Moody Air Force Base, Georgia, April 1, 2020. The COVID-19 Tier 2 screening moved from the 23d Medical Group parking lot to the Davidson Gate, expanding its testing to active duty dependents as part of an ongoing response to limit the spread of the novel coronavirus and preserve combat power. (U.S. Air Force photo by Airman 1st Class Azaria E. Foster)